Tractor hitch



May l, 1923.

F. P. DEDERING TRACTOR HITCH Filed 'Jan. 14 1922 @Normali Patented May 1, 1923.

UITE l,ST

.PA-TENT oFF-ICE.

FRED P. DEDERING, OF KIEL, WISCONSIN.

TRACTOR BITCH.

Application iqled January 14, 1922. 'Serial No. 529,262.

improvements in'hitches and particularly 1 to hitches for use in connection with tractors and agricultural implements.

One object lof the invention is to provide a hitch by meansof which the clutch o-l' the tractor will be automatically thrown outy when Yan excessively hard pull rearwardly `is exerted by the implement, as when striking an obstruction, such as a sto-ne orstump.

Another object of the invention is to p rovide a device of this character wherein'the detent for the movable element of the hitch may be regulated t0, Operate. Only upon e pull being exerted greater than va predetermined one. i i

Other objects and advantages will 'be apparent from the following description. when taken in connection with the accompanyinh drawings.

In the drawings:

Figure 1 is a perspective view of the hitching device, in connection with `the beam of an agricultural implement and with the draw bar of a tractor.

Figure 2 is a vertical longitudinal central sectional view through the main beam and the movable beam, on the line 2-2 of Figure 1.

Figure 3 is a vertical longitudinal central section through the angle bar of the main beam, on the line 3-3 of Figure 1.

Referring particularly to the accompany ing drawings, 10 represents a portion of the draw bar of a tractor, and 11 a portion of the draw bar for attachment to an implement to be drawn, and in connection with which the invention is adapted for use.

Extending at right angles to, andhaving one end disposed between the ends of the bars l0 and 11, is a bar or main beam 12, the said end being bent or doubled to overlie the adjacent portion of the body of the beam. Secured to, and extending trans- Verse-1y 0f the ether aad 0f the beam 12., iS an angle bar 13, the horizontal wing of Ywhich4 secured to the beam.I Mounted on a vertical ,pivot 14, .whichV passes through the `doubled portion ofthe beam, one end of a bar 15, the same extending longitudi` nally over the beam 12,`with its outer end arrangedffor sliding movement on the horizontal jwing of the'anglebar 13. Secured to the' barf1 5,adjacentthe doubled portion of the beam 12, is airearwardly 'extending and -apertured plate 16, the draw' bar 11` of the vagricultural machine being pivotally connected to this plate.l f:

Secured to kthe lower face of the bar l2,

,below fthe pointer attachmentiof the plate 16, is a similar platefli, which extends in a direction opposite' to that of the said plate 16, and has' pivotally connected thereto, the draw bar 10.

Secured to the horizontal wing ot the larngle `loar 13, and being offset upwardly and `rearwardly therefrom, is a keeper plate 17 beneath which the outer end ofv the bar `15 is arranged to lie under normal conditions.

Extending longitudinally on kthe ysaid wing of the` angle "bar 13, .and extending forwardly inthe direction 4of the outer lend ofthe bar 1,5, is aleaf spring 18,' the free end of which is .turned upwardly, las aty18, to

lie against the'adjacent side edge' of ,thev

outer 4end lof thebar 15'. This edge por-A Ation of'thebarl 15`is beveled, as shown at 1521er easy passage beneath theadjacent end of theV spring `18. 'i Disposed vertically through the intermediate portion of the spring 18, and through the horizontal wing of the angle bar 13, is a bolt 19, the head f of the bolt engaging against the lower face of the said wing, while the upper end carries a winged nut 20, arranged above the spring. On the bolt 19, between the nut 20, and the upper face of the spring 18, is a coil spring 21, which adds its tension to that of the spring 18, to maintain the forward end of the spring 18, in firm contact with the upper ace of the wing of the member 13, so that under normal pulling strains the beveled edge of the bar 15 will be prevented from passing beneath the spring 18. Under excessive strains, such as are incident to the 4plows striking a stone or stump, the bar 15 will pass beneath the end of the spring 18.

Carried by the outer end of the bar 15,

and extending vertically -therefrom, is an eye member 22, through which passes a rod 23, a set screw 24 being engaged in the eye member for biting engagement with the rod to permit longitudinal adjustment of the rod through the eye. Connected to the forward end of the rod 23 is a forwardly extending lchain 25, the same passing over a grooved pulley 26, mounted on the forward end of the angle bar 13, Jfrom whence it extends to and is connected with the collar 27 which en` circles the clutch pedal 28 of the tractor.

Thus, when thebar 15 is swung rearwardly, under an excessive strain, the chain 25 will be pulled and the clutch pedal rocked to throw out the clutch of the tractor, with `the result that the tractor and plow will be flat coiled spring 29 which is mounted on.

the vertical wing ofthe angle bar 13, and has its free end disposed under the lateral linger 30 formed on the free end of spring 18, said finger extending acrossthe upper edge of said wing. Pivotally connected to the spring '29, adjacent its free end, is a vertical rod 31, the same having a handhold 32 on its upper end. The spring 29l is of such construction that it acts as a cam, so that wnen the rod 31 is pulled upwardly the springv will engage the finger 30 and lift the spring 29, so that the bar 15 will be permitted to pass forwardly from thereunder. The spring 29 remains in this position to hold up the spring 18, un-

' til .released by a downward push on the rod 43l. lWhen the bar v15 has been released, the .operator can restore the pedal 28 to its normal position by a lifting movement with his foot.

What is claimed is:

1. A hitching device for a tractor including a beam, a bar movably mounted on the beam, a means on the beam and normally contracted by the movable bar for holding the bar against movement under normal pulling strains but releasable by said bar under excessive strains,and means connected with the movable bar and with the clutch pedal of the tractor for moving the pedal to throw out the clutch.

2.` hitching device for a tractor, including a beam for connection with the tractor, a bar pivotally'carried by the beam for connection with an agricultural implement or object to be pulled, a ltransverse member carried by the outer end of the bar, a detent on the transverse member for holding the pivoted bar from movement under normal pulling strains, and meansv operable by the pivoted bar forA throwing out vthev clutch of the tractor.

3. A hitching device for a tractor includy ing a beam, a bar pivotally supported at one end on one end of the beam and extending longitudinally thereof, a transverse member mounted on the outer end of thebeam, a.

spring detent mounted on the transverse member for holding the bar against movement under normal pulling strains, a keeper for the end of the bar mounted `on the transverse member, a rotatable guide on the trans-rA verse member, and a flexible element connected to the bar and to the clutch pedal of the tractor.

In testimony whereof, I aliix my signature,

`Witnesses:

ALBERT WAGENKNECHT HELENA DEDERrNG. 

